cargo fmt

Signed-off-by: bin liu <bin@hyper.sh>

src/net_cls.rs

@@ -11,12 +11,11 @@ use std::fs::File;
 use std::io::{Read, Write};
 use std::path::PathBuf;
 
-use crate::error::*;
 use crate::error::ErrorKind::*;
+use crate::error::*;
 
 use crate::{
-    ControllIdentifier, ControllerInternal, Controllers, NetworkResources, Resources,
-    Subsystem,
+    ControllIdentifier, ControllerInternal, Controllers, NetworkResources, Resources, Subsystem,
 };
 
 /// A controller that allows controlling the `net_cls` subsystem of a Cgroup.
@@ -81,7 +80,10 @@ impl<'a> From<&'a Subsystem> for &'a NetClsController {
 fn read_u64_from(mut file: File) -> Result<u64> {
     let mut string = String::new();
     match file.read_to_string(&mut string) {
-        Ok(_) => string.trim().parse().map_err(|e| Error::with_cause(ParseError, e)),
+        Ok(_) => string
+            .trim()
+            .parse()
+            .map_err(|e| Error::with_cause(ParseError, e)),
         Err(e) => Err(Error::with_cause(ReadFailed, e)),
     }
 }
@@ -102,7 +104,8 @@ impl NetClsController {
         self.open_path("net_cls.classid", true)
             .and_then(|mut file| {
                 let s = format!("{:#08X}", class);
-                file.write_all(s.as_ref()).map_err(|e| Error::with_cause(WriteFailed, e))
+                file.write_all(s.as_ref())
+                    .map_err(|e| Error::with_cause(WriteFailed, e))
             })
     }